Blackwell Publishing Journal Backfiles 1879-2005
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
The microwave dielectric properties of the (1−x)CaTiO3–xCa(Zn1/3Nb2/3)O3 ceramic system have been investigated. The ceramic samples sintered at 1300°–1450°C for 4 h in air exhibit orthorhombic pervoskite and form a complete solid solution for different x value. When the x value increased from 0.2 to 0.8, the permittivity ɛr decreased from 115 to 42, the unloaded quality factor Q×f increased from 5030 to 13 030 GHz, and the temperature coefficient τf decreased from 336 to −28 ppm/°C. When x=0.7, the best combination of dielectric properties, a near zero temperature coefficient of resonant frequency of τf∼−6 ppm/°C, Q×f∼10 860 GHz and ɛr∼51 is obtained.
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